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t's Valentine's Day and while some celeb duos have us saying "AWW" these former couples leave us asking "WTF?"

Did you know that before Justin Timberlake and Britney Spears dated, he hooked up with Fergie

Or that Halle Berry once thought Danny Wood from New Kids on the Block had "The Right Stuff" when they briefly dated in 1989?

Yeah ... both of those things happened.

And they're hardly the only surprising celeb hookups through the years. Check out the gallery above to see who stars like Megan Fox, Ryan Seacrest, Tyra Banks and Tom Cruise dated before their current relationships.

Some of them will definitely shock you.

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